40091603 has 4 divisors (see below), whose sum is σ = 40111008. Its totient is φ = 40072200.

The previous prime is 40091591. The next prime is 40091629. The reversal of 40091603 is 30619004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40091603 - 2⁸ = 40091347 is a prime.

It is a super-2 number, since 2×40091603² = 3214673262219218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40091003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6176 + ... + 10877.

It is an arithmetic number, because the mean of its divisors is an integer number (10027752).

Almost surely, 2^40091603 is an apocalyptic number.

40091603 is a deficient number, since it is larger than the sum of its proper divisors (19405).

40091603 is a wasteful number, since it uses less digits than its factorization.

40091603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19404.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 40091603 is about 6331.7930319934. The cubic root of 40091603 is about 342.2560551802.

The spelling of 40091603 in words is "forty million, ninety-one thousand, six hundred three".